public function minify($group, $assets)
{
$combined_assets = array();
foreach ($assets as $name => $data) {
asort($data['attributes']);
$attributes_string = json_encode($data['attributes']);
$combined_assets[$attributes_string][$name] = $data;
}
$assets_html = '';
$compile = false;
foreach ($combined_assets as $attributes_string => $assets) {
$files_to_compile = array();
$output_files = array();
foreach ($assets as $name => $data) {
$file = path('public') . $data['source'];
if (!File::exists($file)) {
throw new \Exception('The Asset you are trying to compress does not exist (' . $file . ')');
}
$output_files[] = File::modified($file);
$files_to_compile[] = $data['source'];
}
$output_file = md5(implode('', $output_files)) . '.' . ($group == 'script' ? 'js' : 'css');
if (!count($output_files)) {
return;
}
if (!file_exists($this->config['cache_dir_path'] . $output_file)) {
$compile = true;
} else {
foreach ($files_to_compile as $file) {
if (File::modified($this->config['cache_dir_path'] . $output_file) < File::modified(path('public') . $file)) {
$compile = true;
}
}
}
$method = 'minify_' . $group;
$assets_html .= $this->{$method}($assets, $data['attributes'], $files_to_compile, $output_file, $compile);
}
return $assets_html;
}
protected function minify_script($assets, $attributes, $files_to_compile, $output_file, $compile)
{
if ($compile) {
$scripts_to_minify = array();
foreach ($files_to_compile as $file) {
$scripts_to_minify[] = '--js=' . path('public') . $file;
}
$scripts_to_minify = implode(' ', $scripts_to_minify);
$java = 'java';
// find java binary
foreach ($this->config['java_binary_path_overrides'] as $java_bin_path) {
if (file_exists($java_bin_path)) {
$java = $java_bin_path;
}
}
// generate command line
$jar = '-jar ' . __DIR__ . '/drivers/closure-compiler/compiler.jar';
$out_script = '--js_output_file=' . $this->config['cache_dir_path'] . $output_file;
// red team, go!
exec("{$java} {$jar} {$scripts_to_minify} {$out_script}");
}
return HTML::script($this->config['cache_dir'] . $output_file . '?t=' . File::modified($this->config['cache_dir_path'] . $output_file), $attributes);
}